Very good...I didn't enter because I couldn't come up with a decent clue, but I really wanted to explore the Sutter / Gaylord Perry (spitter) variant. I grew up near Chicago and think the great Sutter deserves much more credit as the pioneer of the splitter.
geeker, I was also struck how many letters S(u)TTER and S(pli)TTER share, but couldn't do anything with it. As someone who grew up in Chi and now lives in St Louis I can tell you he is revered down here (win a World Series with the Cardinals and you will never pay for a meal here again).